Self-assessment checklist for high-net-worth individuals

Navigating the complexities of self-assessment can be particularly challenging for high-net-worth individuals. 


With diverse income streams, foreign assets, and various tax relief opportunities to consider, the process demands meticulous attention to detail. 

In this article, we'll walk through a comprehensive checklist to ensure your self-assessment is both accurate and efficient.

Understanding your income sources

The first step is to thoroughly understand and document all your income sources. This includes:

  • employment income, including bonuses and stock options

  • income from self-employment or business ventures

  • investment income, such as dividends and interest

  • rental income from property holdings

  • any other income, such as royalties or income from trusts.

Ensure that you have accurate records for all these income streams. Discrepancies in income reporting are a common trigger for HMRC enquiries.

Declaring foreign assets

For high-net-worth individuals, foreign assets often form a significant part of the investment portfolio. Under the common reporting standard (CRS), information about foreign assets is increasingly exchanged between countries. It’s vital to:

  • declare all foreign bank accounts and investments

  • report income earned from these assets, including interest, dividends, and capital gains

  • understand the tax treaties between the UK and the countries where your assets are held to avoid double taxation

  • properly reporting foreign assets is not just about compliance; it's also about leveraging international tax rules to your advantage.


Utilising tax relief opportunities

There are several tax relief opportunities that high-net-worth individuals can utilise:

  • make the most of your pension contributions, which can be a tax-efficient way to save for retirement

  • utilise ISAs and other tax-efficient savings vehicles

  • consider making charitable contributions, which can be tax-deductible

  • explore tax reliefs available for investments in start-ups or small businesses (like the EIS and SEIS)

  • proactive about tax planning can result in substantial savings.

Avoiding common traps

There are several pitfalls to be aware of:

  • Late or incorrect filings: Ensure that all documentation is accurate and submitted on time.

  • Incomplete disclosure of income or assets: This can lead to penalties and interest charges.

  • Overlooking allowable expenses: Keep thorough records of all expenses related to your income sources.

  • Ignoring the impact of residency status on tax liability.:


Working with a tax professional like Boxwell can help avoid these traps.

Improving tax efficiency

To improve your tax efficiency:

  1. Review your investment portfolio: Ensure your portfolio is structured in a tax-efficient manner, considering both capital gains tax (CGT) and dividend tax.

  2. Consider the timing of asset disposal: Timing can significantly affect the tax you pay, especially in relation to CGT.

  3. Regularly review your residency status: This can have a substantial impact on your tax liability, especially if you split your time between countries.

  4. Stay updated on tax legislation: Tax laws change regularly, and staying informed can help you make more tax-efficient decisions.

In conclusion

For high-net-worth individuals, the self-assessment process requires a detailed and informed approach. 

Understanding your income sources, declaring foreign assets correctly, utilising tax relief opportunities, avoiding common pitfalls, and continuously seeking ways to improve tax efficiency are all crucial components of a successful self-assessment strategy. 


Regular consultation with tax professionals and staying informed about the latest tax laws and reliefs can also help ensure that you not only comply with tax regulations but also optimise your financial position. 


Remember, effective tax planning is an ongoing process and integral to managing your wealth effectively.


To talk about how you can reduce your self-assessment tax bill as a high earner, get in touch with us today.

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